For additional information on the vsftpd 2.0.8 exploit, please refer to the following resources:

While version 2.3.4 is the most searched for "exploits on GitHub," version 2.0.8 is often referenced in the context of older Linux distributions (like those found in or VulnHub challenges). 1. Configuration Bypass: The deny_file Vulnerability

The highly publicized "smiley face" backdoor exploit ( :) ) that opens port 6200 applies specifically to vsftpd 2.3.4 (CVE-2011-2523), not 2.0.8.